a red 'x' or cross sign on a white background

red cross rejection error symbol mark cancel wrong negative prohibition stop failure incorrect bold icon warning wrongchoice dismiss decline danger alert forbidden caution deny mistake notallowed block restriction warningmark prohibitionmark boldred graphic design isolated signage message signal universal attention notification clarity simplicity sharp distinct standout bright focus impactful striking signalmark clean clear indication representation digital print media graphicdesign boldsymbol brightred alertsign wrongsymbol negativesign cancellation declineicon erroricon warningicon prohibitionicon wrongaction blockedsign cautionmark restrictionicon boldcross standouticon